Kim visits military as Koreas slide into Cold War standoff

North Korea's leader has taken a victory tour of military headquarters to celebrate the country's widely disputed claim of a hydrogen bomb test.

Kim Jong Un called the nuclear test "a self-defensive step for reliably defending the peace on the Korean Peninsula and the regional security from the danger of nuclear war caused by the U.S.-led imperialists," according to a dispatch Sunday from state-run Korean Central News Agency.

N. Korea says it conducts successful powerful H-bomb test

North Korea said Wednesday it had conducted a powerful hydrogen bomb test, a defiant and surprising move that, if confirmed, would be a huge jump in Pyongyang's quest to improve its still-limited nuclear arsenal.

A television anchor said in a typically propaganda-heavy statement that the North had tested a "miniaturized" hydrogen bomb, elevating the country's "nuclear might to the next level" and providing it with a weapon to defend against the United States and its other enemies.